package springcloud.controller;

import lombok.extern.slf4j.Slf4j;
import org.springframework.cloud.client.ServiceInstance;
import org.springframework.cloud.client.discovery.DiscoveryClient;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.client.RestTemplate;
import springcloud.entities.CommonResult;
import springcloud.entities.Payment;
import springcloud.loadBalanced.MyLoadBalanced;

import javax.annotation.Resource;
import java.net.URI;
import java.util.List;

@Slf4j
@RestController
public class OrderController {
    //public static final String PAYMENT_URL = "http://localhost:8081"; //单机版
    public static final String PAYMENT_URL = "http://CLOUD-CONSUMER-PAYMENT-SERVICE";

    @Resource
    private RestTemplate restTemplate;

    @GetMapping("/consumer/payment/create")
    public CommonResult<Payment> create(String serial){
        return restTemplate.postForObject(PAYMENT_URL+"/payment/create",serial, CommonResult.class);
    }
    @GetMapping("/consumer/payment/createEntity")
    public CommonResult<Payment> create2(String serial){
        return restTemplate.postForEntity (PAYMENT_URL+"/payment/create",serial, CommonResult.class).getBody();
    }

    @GetMapping("/consumer/payment/get/{id}")
    public CommonResult<Payment> getPaymentById(@PathVariable("id") Long id){
        return restTemplate.getForObject(PAYMENT_URL+"/payment/get/"+id,CommonResult.class);
    }
    @GetMapping("/consumer/payment/getEntity/{id}")
    public CommonResult<Payment> getPaymentById2(@PathVariable("id") Long id){
        ResponseEntity<CommonResult> entity = restTemplate.getForEntity(PAYMENT_URL+"/payment/get/"+id,CommonResult.class);
        if(entity.getStatusCode().is2xxSuccessful()){
            return entity.getBody();
        }
        else{
            return new CommonResult<>(501,"没有对应记录ID");
        }
    }

    @Resource
    private MyLoadBalanced myLoadBalanced;

    @Resource
    private DiscoveryClient discoveryClient;

    @GetMapping(value = "/consumer/payment/lb")
    public String getPaymentLb(){
        List<ServiceInstance> instances = discoveryClient.getInstances("CLOUD-CONSUMER-PAYMENT-SERVICE");
        if(instances  == null || instances.size() <= 0 ){
            return null;
        }
        ServiceInstance serviceInstance = myLoadBalanced.instances(instances);
        URI uri = serviceInstance.getUri();
        return restTemplate.getForObject(uri + "/payment/lb",String.class);
    }
}
